1 /*
   2  * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot.nodes;
  24 
  25 import jdk.vm.ci.meta.JavaKind;
  26 
  27 import org.graalvm.compiler.core.common.LocationIdentity;
  28 import org.graalvm.compiler.core.common.type.StampFactory;
  29 import org.graalvm.compiler.graph.NodeClass;
  30 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
  31 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
  32 import org.graalvm.compiler.nodeinfo.InputType;
  33 import org.graalvm.compiler.nodeinfo.NodeInfo;
  34 import org.graalvm.compiler.nodes.FixedWithNextNode;
  35 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
  36 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  37 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  38 
  39 /**
  40  * Saves all allocatable registers.
  41  */
  42 @NodeInfo(allowedUsageTypes = {InputType.Memory})
  43 public final class SaveAllRegistersNode extends FixedWithNextNode implements LIRLowerable, MemoryCheckpoint.Single {
  44 
  45     public static final NodeClass<SaveAllRegistersNode> TYPE = NodeClass.create(SaveAllRegistersNode.class);
  46     protected SaveRegistersOp saveRegistersOp;
  47 
  48     public SaveAllRegistersNode() {
  49         super(TYPE, StampFactory.forKind(JavaKind.Long));
  50     }
  51 
  52     @Override
  53     public void generate(NodeLIRBuilderTool gen) {
  54         saveRegistersOp = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitSaveAllRegisters();
  55     }
  56 
  57     /**
  58      * @return the map from registers to the stack locations in they are saved
  59      */
  60     public SaveRegistersOp getSaveRegistersOp() {
  61         assert saveRegistersOp != null : "saved registers op has not yet been created";
  62         return saveRegistersOp;
  63     }
  64 
  65     /**
  66      * @return a token that couples this node to an {@link UncommonTrapCallNode} so that the latter
  67      *         has access to the {@linkplain SaveRegistersOp#getMap register save map}
  68      */
  69     @NodeIntrinsic
  70     public static native long saveAllRegisters();
  71 
  72     @Override
  73     public LocationIdentity getLocationIdentity() {
  74         return LocationIdentity.any();
  75     }
  76 }